Cutting Bits and Bit Adjustments

Introduction: Cutting Bits and Bit Adjustments

About: Autodesk Technology Center San Francisco is a hub for research, development, and demonstration of new manufacturing technologies and workflows relating to configurable microfactories.

Bits come in a variety of shapes, diameters, and lengths.

Some bits have a top or bottom bearing for following a template. If you are working from the Pier 9 workshop, see Shop Staff for assistance with bearing bits. If you are working from another studio or shop, refer to your tool's manual for reference on working with a bearing bit.

Step 1: Installing the Collet and Bit

The bit is held in a collet, which is attached to the router.

  1. Snap the collet into the collet nut.
    • The collet should freely rotate inside the nut.
  2. Slide the shank of the cutting bit into the collet.
    • The shank of the bit must fit snugly in the collet.
    • Do not force bits into the collet.
  3. Turn off the router, and press the E-stop.
  4. Place the bit into the router and hand tighten the collet nut.
  5. The collet should only engage the shank, not the cutting edges.
  6. Use the collet wrenches to tighten the collet.
    • Use one hand to hold both wrenches, and squeeze them together.

Consult your tool's manual or see Shop Staff before using any bit over 1/2" (13mm) in diameter.

Step 2: Installing a Table Insert

Always use a table insert that leaves the smallest gap possible around the bit. The bit should not touch the insert.

Use the plastic spanner to place an insert into the table opening. Rotate the insert 1/4 turn to lock it in place. Remove the insert by turning then lifting.

Step 3: Adjusting the Bit Height

  1. Unlock the handle.
  2. Turn the handwheel.
  3. Snug the handle.

Step 4: Using the Digital Readout (DRO)

The DRO displays vertical movement of the bit and allows for precise positioning and depth of cut.

  • Press and hold ON/OFF to reset the display to 0.

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